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<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
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<body>
    <!-- 1、标题标签 -->
    <h1>一级标题</h1>
    <h2>二级标题</h2>
    <h3>三级标题</h3>
    <h4>四级标题</h4>
    <h5>五级标题</h5>
    <h6>六级标题</h6>

    <!-- 2、段落、换行、水平线 -->
    <p></p>
    <br>
    <hr>

    <!-- 3、图片、音频、视频 -->
    <img src="" alt="">
    <audio src=""></audio>
    <video src=""></video>

    <!-- 4、超文本链接 -->
    <a href=""></a>

    <!-- 5、文本标签 -->
    <em>定义着重文字</em>
    <b>定义粗体文字</b>
    <i>定义倾斜字</i>
    <strong>定义加重语气</strong>
    <del>定义删除字</del>
    <span>元素没有特定的含义</span>

    <!-- 6、语义化标签 -->
    <header>网页头部</header>
    <nav>网页导航</nav>
    <footer>网页底部</footer>
    <aside>网页侧边栏</aside>
    <section>网页区块</section>
    <article>网页文章</article>


</body>

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